Paper-machine.



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PAPER WTNESSES:

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APPLICATION F I L E D N 0V.23,1011,

Patented Apr. 2, 1912.

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FII Ell NOV. 23. 1911.

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UNITED sTATEs PATENT oEEioE.

CHARLES E. POPE, OF HOLYOKE, MASSACHUSETTS, ASSIGNOR OF THREE-FIFTHS T JAPANESE TISSUE MILLS, OF HOLYOKE, MASSACHUSETTS, A CORPORATION 0F M-.QSSACHUSETTS PAPER-MACHINE.

v Application led November 23, 1911.

Specification of Letters Patent.

Serial No. 661,913.

T o all whom t may concern:

Be it known that I, CHARLES E. POPE, a citizen of the United States of America, and resident of Holyoke,in the county of Hampden and State of Massachusetts, have invented certain new and useful Improvements in Paper-Machines, of Which'the folof the United States issued to me May 16,

'The particular object of the apparatus in which this invention is comprised is to assure the carrying of the web of paper as it merges from the wet end of the Fourd'rinier machine through the drying` apparatus under its proper tension in all parts.

of such drying apparatus so that the web will neither be unduly stretched or broken nor lallowed to become too. slack to form wrinkles or transverse foldings therein.

The invention contemplates the provision in coperative` relations of one of the web carrying felt aprons and a drier drum and' variable speed means for the propulslon of the apron, additional variable speed means for the rotative driving of the drier drum,

l with means for controlling the latter va- I unison.

In the operation of the machine organmed.

riable speed means, and further drier drums and independent means for rotating them in in accordance with my present invention, it becomes possible to run the first drier drum at a surface speed exactly corresponding to that of the web carryin felt apron, irrespective of the thickness o such apron and without dependence upon the means for its propulsion, and to run the further drier drums at a slightly greater surface speed than that of the first drier drum and of the web carrying apron so that after the web shall have been taken off from the apron onto and carried by the first drum, it will in its passage around the further drums be subjected to just a slight degree of tension for its being run throu h the drier in perfectly smooth,'unwrinklec and unbroken condition.

Means with resultant capabilities such as above outlined have been found especially necessary in the forwardly feeding and drying of the web of paper when the latter is especially light and thin, as is the case for the making of tissue paper. A

The invent-ion, furthermore, consists in means coaeting with the periphery of the first drier drum for imparting an extremely smooth and glass-like surface to the latter, whereby the web brought to and running partially `around 4said rst drier drum will readily and of its own accord ,break away or become separated from such peripheral surface so as to have its course to and around the next one of the further series of drier drums.

The invention is Vdescribed in conjunction with the accompanying drawings and is set forth in the claims.

In the drawings :-Figure l is a side elevation including the forward' end portion of the wet part of the Fourdrinier machine feeding and drying apparatus; Fig. 2 is a longitudinal vertical sectional View through the same; Fig. 3 is an elevation as seen beyond the plane indicated by the line 3 3, looking in the direction, of the arrow; and Fig. 4 is a partial plan view.

In the drawings,at the right hand portion of Figs. 1 and 2, the web drawing out means, that is the means for forwardly advancing a very thin wet web of paper toward the drie'rs, is indicated as consisting of a pair of press rolls aand b between which run the endless aprons or bands of felt, the upper endless band d being of hard felt while the one f is of soft felt, it being well known that the wet web of paper wlll adhereto and be carried along by the hard felt apron; and such hard felt apron passes forwardly upwardly around the guide rolls c c in proximity to which is the rst drier drum, A. One of the press rolls is carried by a rotative shaft B on the end of which is a bevel gear wheel B2 which meshes Patented Apr. a, 1912. j

into a smaller bevel gear wheel or piniony drier drum A'.

d between the separated rolls c c runs with 'the vweb in peripheral contact against the -rear peripheral .portion of the first drier drum, and the web, as usual, thence passes H5from the iirst drier drum to and around the seriesp drierdrums A A in upper and lower tiers. The web 'thence passes to andthrough thecalenders .to-the reel. The rst drier drum v"A has on one end thereof a comparatively' large spur gear wheel it with which meshes a smaller spur gear` wheel 'z' axed on a short horizontal transverse "shaftj journaled in the bracket ja. The shaftj has a cone pulley D fastftherepulley leys so that `from th rotation-imparted to the drivenpress roll shaft B, a rotation of the first drier drum will be given inthe same direction. The belt F comprised in the cone pulley variable speed drive has the usual description of belt shiftingoradjust-v ing means, the same consisting of the screw 25 and .the operatm yhandwheel In, the yoke ifts thread enwheel 'so thatl vshaft la having the 4belt engaged yoke 7a2 lcarrying screws aft havin gagement through the han when such wheel' is turned the fine adjustdriving means may be acquired;

i'. All of the drier' drums A' A of thejseries are'causedlto run together and in unison by means independent of the driving means 35 for'the first drier drum, that is the drums lA. are all connected by the` trainof spur gears G', one of the gear provided drums having a pulley H run by belt J which isdriven from a shaft, not showin but underyidestood as--being .a primary source of power V of thel felt apron d and the paper web car-.-

' ried thereby, and that the rest of the' drier drums A `A of the` series be run at an imperceptible, but practically 4appreciable higher rate of speed than` that of the rst The 'power shaft for the entire machine or paper plant being started and throu hthe connections therewith the drums A will be driven by the belt and pulley J, H, and the trainof gearing Gr G; and the web drawing out means willl driven` from the cone pulley B5 having the shiftable belt B", bevel gearing B, B2, and

. press roll propulsion shaft B.. 'This web on, and the Vpress roll shaft B has a' 'cone E aiiixed thereon,-the cross belt F runnlng around both of t-he said cone pnlment and regulation of Athe variable speed e fit-,eeasvedrawin@r out meansmay have its motion hat' a speed approximately the same as, but

generally slightly slower than, the speed-bfthe drier drums A A, and lthe rst ldrier drum will through the cone .pulleys and web drawing out means.

i 0 cross belt be run 1n -comunctlon with. the

Experience and -practife have shownthat although the drawing out means-and the 'first drier drum may be run more or" less nearly inunison when both are drivenfrom .a common shaft, such as theoneB, there will, nevertheless, be found aislight variation asA between the surface speed of the felt apron aland the periphery of .the drum A sometimes occasioned bl variations between the thicknessesof old and new aprons,

and also between thethicknesses of the wet lweb of paper being m'a'de therefore," for the nice .and `exact regulation of the machine where'f'or a short part of its length the apron d runsy next-to the'periphery of the rstdrier drum, the variable speed driving means for said drier drum is .ofveryegreat 1 If the first drier drum A laimportance.

bv reason of the'irstdrier drum being .at all times out of gearingconnection Withall gs eo relatively' to the traveling speed ,of the Web drawing outI means, its running speed may be l .increased as required, and vice versa';'a'nd` of the other drums of the series, such other drums may, by their vindependent propuli.,

sion means, be driven at a very l slig tly greater running speed than that of the drum so that there may be a take-up and ten-f.

, 10o sioning action exerted relativelyI to thewebi whieh beeemee expended er slightly in.;

creased in length, `after'havin'gtbeen sub jected to the'heatin'g and ldrying ac tionoi the first drier drum in which I maintain'a higher-'pressure for the acquirementbf a greatest degree of moisture at the' timeit drier drum', has the tendency to adhere'to, and be carried entirely around by such first drum; and in' order that this tendency ofl adhesion maybe overcome,l and so that the,- web will breakaway and assume a line of. progression more or less nearly tangential, to the periphery of the rst drum, and about much greaterheat than is the case `re^ f .spect tothe remainder'ofthe drums. j

The web ofpaper'by reason of having the `'comes to and runs partially around the first w as indicated in Fig. 2, (m. representing the.;

web), I provide means coperative with the first drier drum for polishing the circunrferential surfacel thereof' and imparting thereto a highly smooth, bright and-.glass like surfabe. e

The first drier drum is made ofcast iron with greater thickness of walls than usual; andbeneath the same is-y horizontally trans- 'versely and pivotally mounted a compara tively bulkytiltable bar M,-see Fig. 2--' .I

provided, at each end, outside of its pivotal or journal support with a lever like extension m 'to which a comparatively heavy Weight n', is hung. This bar M is made of cast iron and being in edgewise contact at all times and under considerable pressure against the surface of the drum A', renders such surface of a highly polished, smooth and bright character,-al1 pits, .roughness and inequalities in the web carrying surface of this hollow cylinder being automatically removed. y

I claim l. In a paper machine, the combination of web drawing out means, and variable speed driving means therefor, a drier drum with which the web drawing out means coperates, and variable speed driving means for said drier drum, a series of further drying drums, and independent means for rotatively driving them in unison.

2. In a paper machine, in combination, web drawing out means including a roll guided felt apron, a shaft by means of which the roll guided apron is propelled, and variable speed mechanism for the driving of the shaft, a drier drum with which the felt apron cooperates, variable speed driving means between said shaft and said drier drum, a series of further drier drums and independent means for rotatively driv- Aing them in unison.

3. In a paper machine, the combination with a web drawing vout means including the press rolls and felt aprons, a shaft on which one of the press rolls is carried and variable speed mechanism for the driving of said shaft, of a drier drum with which one of the felt aprons coperates, a cone pulley having a driving connection with said drier drum, a cone pulley on the press roll shaft, a belt around said cone pulleys, and belt adjusting means, a series of further drier drums, and independent means for rotatively driving them in unison.

4. In a paper machine, the combination with a web drawing out means including the press rolls and feltA aprons, a shaft on which one of the pressrolls is carried and variable speed mechanism for the driving of said shaft, ofr a drier drum with which one of the felt aprons having a gear Wheel thereon coperates, a smaller gear wheel in mesh with the irst named gear wheel, having a cone pulley associated therewith, a'

cone pulley on the press roll shaft, a crossed belt around said cone pulleys, and belt adjusting means, a series ,of further drier drums, and independent means for rotatively driving them in unison.

5. In a paper machine, in combination, the press rolls and felt aprons, a shaft on which one of the press rolls is carried having a cone pulley and a gear wheel thereon, another shaft having a cone pulley with driving belt therefor, and a gear wheel in mesh with saidirst named gear wheel, a drier drum with which one of the felt aprons cooperates, Va cone pulley having a driving connection Iwith said drier drum and ajpulley running around the last named vcone pulleV and the cone pulley on the press roll shaft and adjusting means for said belt, la series of further drier drums geared together for rotation in unison, and means for the rotative propulsion of the said further drier drums.

Signedby me at Springfield, Mass., in presence of two subscribing witnesses.

` CHARLES E. POPE. Witnesses:

G. R. DrusooLL, WM. S. BELLows. 

